Perforator for printing presses



H. E. PETERSON PERFORATOR FOR PRINTING PRESSES Feb. 12 1924.

' Filed March '26. 1923 I Hem r'r f Pai'ar-S I).

lllllllllllllll lllllllllll III] yam Women Patented Feb. 12, 1924.

UNETED STATES HENNING E. PETERSON, 0F DULUTH, MINNESOTA;

PERFORATOR FOE PRINTING- PRESSES.

Application filed March 26, 1923.

To all whom it may concern Be it known that I, HENNING E. PETER- SON a citizen of the United States, residing at buluth, in the county of St. Louis and State of Minnesota, have invented certain new and useful Improvements in Perforators for Printing Presses, of which the following is a specification, reference being had therein to the accompanying drawing.

This invention relates to improvements in printing presses and has particular reference to a perforating device therefor which in operation will perforate the sheet before it is printed.

The principal object of the invention is to provide a perforating device which may be attached to any form of cylinder press with the minimum amount of inconvenience, and which may be adjusted freely at will.

It is known that there are perforating devices now'upon the market, but they are practically all 'frictionally driven and quite frequently the paper will slip while traveling about the cylinder thusproducing an inaccurate perforation, and to correctthis defect forms another object of my present invention.

Other objects and advantages of the novel combination of parts will appear in the further description of the invention.

Referring now to the accompanying drawing forming part of this application and in which like reference characters indicate like parts:

Figure 1 is a front elevation of the impression cylinder of a printing press showing my improved perforating device attached thereto;

Figure 2 is a fragmental sectional view taken on the line 22, Figure 1; and

Figure 3 is a side elevation of the center perforator bar brace.

in the drawings, 1 represents the drive gear of an ordinary cylinder printing press, 2 the cylinder gear, 3 the impression cylinder and t indicates the top of the feed board. The tape pulleys are shown at 5, mounted upon the rod 6, which is journalled in any de sired manner in the frame of thepress. It will be understood by those versed in the art that the paper is fed one sheet at a time from the feed board, each sheet being caught by the sheet grippers, and conducted around the impression roller when the fly cylinder with grippers thereupon will take the print-- ed sheet from the impression cylinder and Serial No. 827,761.

fiifilly deliver the printed sheet to the fly ta e.

The particular type of press here de-- scribed is provided with an upper cylinder brush '4' and the same is held in proper spaced relation to the impression cylinder by the suitable braces 8, they being mounted upon the bar 9, which is journalled within the frame of the press and held thereto by the bolts 10 which are screw threaded into the ends of the bar 9, as is common. The braces 8 areiprovided with set screws by which the pressure of thebrush against the cylinder may be regulated.

Near either end of the bar 9 I have provided a brace 11, the same being non-rotatably mounted upon said bar 9 by means of the through pin 12. Within this brace 11 I have installed the eccentric bearing 18, the same havingthe tumbler handle llfixed thereto, and through which bearing the perforator shaft 15 passes though somewhat eccentrically. Upon the perforator shaft may be installed any desired number of perforator wheels 16, they being provided with set screws so that they may be secured to the shaft inany predeterminedpositiomand to one end of the shaft is fixed the gear 17 which meshes with the cylinder gear 2, and the relation of these two gears is such that the circumferences of the cylinder and the perforator wheels, when the press is in operation, move at the same speed. The lower ends of the braces 11 are turned slightly inwardly and form bearings for the sheet guard rod 18, the same being non-rotatably mounted in the bearing as by the set screws 19. Upon the rod 18 are mounted the sheet guards or fenders 20, any number of which may be employed, they being secured in their predetermined position upon the rod 18 by the set screws 21.

From the foregoing it will be apparent that the improved perforating device described may be installed upon any cylinder press such as illustrated by simply removing the bolts 10, which will free the rod 9, when the braces 11 may be slipped onto the rod 9 in such a manner that the gears 17 and 2 will be in mesh, the bolts 10 then applied which will hold the device in operative position so that when rotation is imparted to the gear 2 it will in turn rotate the shaft 15 and perforator wheels 16 which will perforate the sheets of paper as they pass about the impression cylinder.

t will be obvious that there will be instances when the perforating device will not be desired and to prevent the necessity of removing the entire device for such instances, is the object of eccentrically mount ing the shaft 15 within the bearing 13, as the slight movementof the handle it in either direction will move the shaft 15 slightly, which will in turn move the perforator wheels 16 from contact with the impression cylinder, thus allowing the sheets to pass around the cylinder without being perforated.

io prevent undue vibration of the shaft to I have provided the center brace 22, the upper end of which is in the form of a two part clamping member which may be clamped about the rod 9' and securely held thereto by the bolt 23, while the lower end of the brace 22 is in the form of a half bearing which may be placed about the shaft 15 and provides an additional support therefor.

It will be noted that the cylinder brush is positioned just above the pcrforator bar for the purpose of eliminating any wrinkles in the sheet being printed as it passes about the cylinder and before it is perforated, it being obvious to those versed in the art that if the sheet is not perfectly flat upon the cylinder a true perforation would not resultv Various modifications in the structure here illustrated and described may be resorted to without departing from the spirit of the appended claims.

Having thus described my invention, what I claim and desire to secure by Letters Patent. is:

l T he combination with a cylinder printing press of the character described including a cylinder gear, frame, and cylinder, of a perforating device therefor comprising three parallel shafts, one of which is nonrotatably secured to the frame of the press and supports the other two shafts, another of said shafts having a gear upon one end thereof meshing with the cylinder gear perforator wheels attached to said last mentioned shaft, and sheet guards upon the other of said shafts.

2. A perforating device for cylinder printing presses comprising in combination three parallel shafts, brackets for holding said shafts in spaced relation to each other, adjustable perforator wheels attached to one of said shafts, means for rotating said perforator wheels, and means for varying the relation of the perforator wheel shaft to the other two shafts.

3. The combination with a cylinder printing press of the character described including a frame, a cylinder gear and cylinder, of a shaft mounted within the frame of the press, perforator wheels mounted upon said shaft in contact with the cylinder, and eccentric means for varying the relation of the perforator wheels to the cylinder, substantially as described.

In testimony whereof I hereunto aflix my signature.

HENNING, E. PETERSON. 

